dct_channel_index = {
    24:
    [
        [0, 1, 2, 3,
         8, 9, 10, 11,
         16, 17, 18, 19,
         24, 25, 26, 27],
        [0, 1,
         8, 9],
        [0, 1,
         8, 9]
    ],
    32:
    [
        [0,  1,  2,  3,  4,
         8,  9,  10, 11, 12,
         16, 17, 18, 19, 20,
         24, 25, 26, 27,
         32, 33, 34],
        [0, 1, 2,
         8, 9],
        [0, 1, 2,
         8, 9]
    ],
    48:
        [
            [0, 1, 2, 3, 4, 5,
             8, 9, 10, 11, 12, 13,
             16, 17, 18, 19, 20, 21,
             24, 25, 26, 27, 28, 29,
             32, 33, 34, 35,
             40, 41, 42, 43],
            [0, 1, 2,
             8, 9, 10,
             16, 17],
            [0, 1, 2,
             8, 9, 10,
             16, 17]
        ],
    64:
        [
            [0, 1, 2,  3,  4,  5,  6,
             8, 9, 10, 11, 12, 13, 14,
             16, 17, 18, 19, 20, 21,
             24, 25, 26, 27, 28, 29,
             32, 33, 34, 35, 36, 37,
             40, 41, 42, 43, 44, 45,
             48, 49, 50, 51, 52, 53],
            [0, 1, 2,
             8, 9, 10,
             16, 17,
             24, 25],
            [0, 1, 2,
             8, 9, 10,
             16, 17,
             24, 25],
        ]
}
